Figure 6 Expression analyses by qRT-PCR for 8 Ca-related genes in P. massoniana seedlings cultivated at various Ca levels . (A) Calmodulin, CaM . (B) CDPK-related kinase gene, CDPK1 . (C) Calcineurin B-like Ca sensor protein 1 gene, CBL1 . (D) Touch 3 gene, TCH3 . (E) calreticulin 3 gene, CRT3 . (F) Alnexin 1 gene, CNX1 . (G) Glutamate dehydrogenase 2 gene, GDH2 . (H) Respiratory burst oxidase homolog A gene, RbohA . Bars indicate the mean value ± SE (n=3).